For ball valves with larger nominal sizes, in order to facilitate processing, manufacturing and assembly, a side-mounted three-piece structure is often used, that is, the valve body is divided into three parts along the sections perpendicular to the channel axis at the two valve seats. The central axis of the rod is symmetrical, has smooth lines, beautiful appearance, and is easy to manufacture. It is suitable for manufacturing large valves with small equipment. The disadvantage of this structure is that a pair of large flanges are added, and the total weight of the valve body is increased.
